Range¶

Type:	Vector<complex>
Range:	[v_1, …, v_2]
Default:	-/-
Appearance:	optional

With this 2-vector parameter $[n_\mathrm{eff}^\mathrm{(min)}, n_\mathrm{eff}^\mathrm{(max)}]$ you can compute all eigenvalues contained in the following rectangular domain of the complex plane:

$\begin{eqnarray*} \Re(n_\mathrm{eff}^\mathrm{(min)}) & \leq \Re(n_\mathrm{eff}) & \leq \Re(n_\mathrm{eff}^\mathrm{(max)}) \\ \Im(n_\mathrm{eff}^\mathrm{(min)}) & \leq \Im(n_\mathrm{eff}) & \leq \Im(n_\mathrm{eff}^\mathrm{(max)}). \end{eqnarray*}$

Warning

Choosing a wide range may result in the computation of a large number of modes. You can use the range criteria together with near NearGuess section. Then, only the desired number of modes within the range closest to the guess are computed.